Figure 5

In vivo PA imaging of a xenografted tumor model.

In vivo ultrasound/PA images (a,c) and PA value (b,d) of tumors before and at 0.5 h post IT ([Au] = 100 mM, 0.04 mL in PBS, a,b) and at 6 h post IV ([Au] = 100 mM, 0.1 mL in PBS, c,d) injection of the Fe₃O₄ @ Au-PEI.Ac-PEG-FA NSs.